Triple-valve reamer



Nov. 25, 1930. .1. R. RlcKETTs TRIPLE VVALVE BEAMER Filed July 1, 1926 2 Sheets-Sheet l Nov. 25, 1930. J. R. RlcKET-rs TRIPLE VALVE REAMER Filed July l, 1926 2 Sheets-Sheet 2 Patented Nev. z5, 1930 oNiTEDfsTAT SERVICE, ino., QFcRENO, NEVADA, A

12S PATENT TRIPLE-VALVE BEAMER.,

{App'nauon filed July 1, 192e. ".sefiarnof119,907. l

l, V Tliisinvention relatesto machine Vtools and "l particularly pertains to a reaming tool.

It is the .principal object ofthepresent invention to provide atool capable Vof use in accurately .and expeditiously reaming worn cylinderbushings of triple valves. In carrying out this object I provide a mechanism for accurately aligning the` too with the cylinder bushing and'for locating thelowest point therein. After the lowest peint has been located, the.cutting`tool of the i is exemplified in.` the following description A y up any wear occurring between the head'I and Y @rated to ream the bushingf @ne form which the invention may assume device may befquiclly set and the device op- `and illustrated by wayofex'ample in theaccompanying drawings, inrwhich: l

F1 1 is a central sectional viewfthrough a Atriple valve and a reaming tool .embodying\` fthepreferred form of my invention. i

iv-rv0f Fig. i. i

Eig. 2 is an enlargedsectional View through a vportion of the indicatingmechanism in the heado'f the reaming device.

Fig. 3 is a sectional `view ytaken on `line III-#III of Fig; 1. Q

Fig. 4.- is asectional Fig. 5 'is a fragmentary view in` partial section through the indicatingl mechanism at the outer end of the tool head. A

perspective View of the tool Fig. 6 `is a holder.,

Fig. .7 is a-transverse section through the "tool head taken on line V.VII4`VI-I'of Fig. `1 and disclosing; themechanism for takinoup wear between the tool head andthe mandrel.

Referring` more particularly to the accom# A `panyingdrawings, 10 indicates atriple valve bodyfofnany standard design and in connec- `)tion with3whichr al reaming` tool, generally l indicated at 11, is capable of'use. This ream ingtool' 11 .vhichcomprises theinvention isf designed for the purpose of reaming the bore y of atlcylzinder bushing 12in` the valve bodylO after the same has become worn. will "be noticed fromlig. 1 of thedrawingsthatthe cylinder bushing 12 is disposed at one end'of thevalve body 10 and communicates with an view taken y on line YThis elongated valve chamber 14 which "extends between` theV cylinder bushing 12 and the 0p.- positeend ofthe valve body 10i The valve chamber 14 isconsiderably smallerincross sectional area` than f the bore of the cylinder bushing` `12, forming a shoulder between the v two as indicated by the numeral 15. tool whichfmay be mounted on a triple valve. This toolf is provided with .an indicatinw The reaming tool 11 comprises a tool carrying head 1G `which issubstantially cylindrical and is formed j with 'a centrally located bore 17, by means of which it isturnably and slidably mounted on what I preferto terma mandrelv 18; The fit between the" mandrel, and the toolfhead 16 is a running `fitsothat:`

the tool head 1G willbe "accurately held axial alignment with theinandrel. .i l In` order to provide adjustment `for-taking opening' 16?* is a plugwhich bears against the mandrel Atthecuter end of each opening 16a a threadedplug'is inserted` An adjust- "ment screwV 16"` is threadedthrough this'plug,1 *a'nd bears againsttlie 'end of thereciprocable v Awhile the end? 2O of the mandrel will project:

within the valve chamber 14, as "disclosedin Fig. 1.!

a projectingstud21. Oneend of thisstud is threaded into the end ofthe mandrel ".18 L

Vthe mandrel, the head 16`isformedwith;l a pair of-.radialopenings indicated at'la.` Re- 7o ciprocably niountedintheinner endgof each en dQO ofthe `mandrel is fittedwith?` l e e0 in axialalignmenttherewith.` "."The cmpfcsite.`

cndproj ects throughthe chamber and threaded to" receive a clamping-nut 22.

Turnably meijinted on the stud 21 interme` diate the clamping 111.11122 and the mandrel 18 isa collar 23 which isformed across sec- A tionalareagreater than that of the chamberV i 14, fso `th`at r it may `abutV against, the enfd of *thevalve bodylO overfthe end of the chamber `This collar 23 is formed with flatsideslu()` 2e against which thumb screws 25 abut. These thumb screws 25 are arranged at right angles to the axis of the mandrel 18, and are threaded through a sleeve 26. This sleeve 26, when the. reaming tool is used, is threaded onto a sleeve-like portion 27 at the end of the triple valve. By means of the thumb screws 25, it is obvious that the center ot the mandrel may be adjusted to axially align it with the center oi3 the cylinder bushing 12, prior to the tightening of the nut 22 which will clamp the valve body between the shoulder 19 on the mandrel and the collar 23 and rigidly hold the mandrel Vin place relative to the bore of the cylinder bushing 12.

In the present device l have provided what I prefer to term an indicator mechanism, the purpose of which is to locate the center of the bushing 12 so that the tool may be accurately aligned therewith, and to locate the low spots in the bore of the bushing so that the cutting tool may be accurately set to ream the bushing. This indicator mechanism is disclosed in Figs. 1 and 4L ot the drawings, and comprises a cylindrical guide member 28 extending transversely within one side of the tool head 16 flush with the outer periphery of the head, in which position it is secured by a set screw 29. Arranged transversely ot the guide member 28 is a swivel pin 30. Arranged in the bore of the guide member 28 at one side o' the swivel pin is a ball 31. Extending through this ball and iixed in the swivel pin 30 is an indicator pin 32, which extends co-aXia-lly of the head 16 through an aperture 33 therein to a point beyond the outer end of the head 16.

Arranged at one side of the ball 31 within the bore oil: the guide member 28 is a teeler member 34. The outer end oit this feeler member 34 is reduced in diameter and projects through the reduced end of the bore in the guide 28. The shoulders resulting from the dillerences in diameters at the outer end of the guide member 28 prevents the lieeler member 34 Yfrom projecting outwardly beyond its limit. At the inner side of the ball 31 and in the bore of the guidemember 28 is a spring-pressed member 35, between which and the head is interposed an expansion spring 36, the action of which constantly7 tends to torce the eeler member Sli outwardly from the periphery of the tool head 16. It is seen that the faces of the eeler member 34 and the spring-pressed member 35 which engage the ball are concave so that reciprocable movement ot the feeler member 34E will actithrough the ball 31 to oscillate the indicator pin 32, due to the tact that the end ot this indicator pin 32 is anchored in the transverse swivel pin 30 in the guide member 28.

Due to the differences in distance between the center of the 'eeler member'3l and the pivotal point ot the pin 32, and between the center ot the feeler member 34 and the outer end oil` the pin 32, very slight movement ot the feeler member 34 will imp art considerably greater movement to the ouer end ol the pin. 32. At this latter end the pin 32 connects with an indicator hand 37, which lies at the end of' the tool head 1li and pivoted thereto at a point indicated by the numeral 38. The point ot connection between the oscillating pin 32 and the hand 37 is eccentric relative to the pivotal point of the hand, so that oscillating movement of the pin 32 will cause swinging movement of the hand. This point oic connection is also closely ad.- jacent to the pivotal point o'i the hand so that compziratively small movement of the oscillating pin 32 will impart considerable movement to the indicating end ot the indicator hand.

Also arranged on the end ot the tool head 1G and beneath the indicator hand -lor cooperation thercwith is a calibrated scale +20. This scale is pivotally mounted about the pivotal point ot the hand at one end and at the other end is provided with a slotted opening through which a clamping sc lew -l-O entends into the head. By loosening` this screw, the dial may be set radially with respect to the indicator hand, and held in such position by means ot' the clamping screw. ii spring 3S) is connected with the hand 3i' and cooperates with the spring 36 and the guide 28 to take up any lost motion occurrin etwcen the parts.

l? rom the foregoing it is obvious that by the. use of' the teelcr and indi ating mechanism just described that when the mandrel 18 is located exactly centrally ci" the bushing 12, that by rotating the tool head 16 the low spots in the bore ot the. lnishing l2 will be 25,5 indicated on the scale l0 by the hand 37, and thus the lowest spot in the bore ot the bushin may be easily and quickly located. Likewise, should the mandrel 18 not be in the center, by the use ot the indicator mechanism the center may be readily located, and the mandrel clamped in place relative to the valve body. y

To accomplish this latter operation, the triple valve is set on end with the bushing t5 uppermost and the rean'iing` tool is mounted on the valve wie; its mandrr-xl extending therethrougl. The mandrel then loo- ,Y clamped to the valve by means oli the nut 22. The tool head 16 is then slowly revolved 113e by means of the :ank handle l1 and the ditterent positions of the hand 37 on the scale 40 is note-d at diametrically opposite points. The difference of the reaoing oi these points is then divided and the thumb screws 25 are 35 actuated to properly align the mandrel with respect to the axis of the bushin It is seen that whenthe t'eeler member is at the point closest to the tool head that it the a :.'tuating screws were released, the spring pressure be- 130 muy ` `seethat the `distance that the i'eeler member l cally opposed `1 6,'thetool head 16 may revolve, without any movement. of the hand 37, indicating that the hind the` eeler member 'will l cause the tool jf :head to move` toward l the center.

` During this time the indicating hand is watched to nieves the head 16'is halffthe difference of themaximum reading between the two diametrically-,opposed points.` IWhen this operationisdcne atlvarious "diierent diametripoints of `rotation of the headv "scenterzof the bushing"v haszbeenfound.:y

. [After the'centenhas beenlfonnd theiycali- `brated scale 40 may be swung about its-pivoltal "point so that the indicator handwill "indicate zerothereon.` This .will permit the amountrof weardn thebushing to be accurately determinedasewill hereinafterbe deg As? before `designed for this endthe headl V16 is formed with acylin-` 'dricalfrecess`42` disposed at a point diametriscribed.`

`rea-ming thebushing 12Qand "to 4call-yopposite the` feeler mechanism 84. This drical sha-nk 44 (see Fig. 6)

h 45 is interposed vbetween the andthe tool head 16 and normally tends to `force the latter outwardly. The tool carcyllndrical recess `,42 slidably receives a tool carrier 43 which is providedwith a cylin- `which projects withinthe recess 42."` Anexpansion spring rier 43fisformed Vwith a` tool socket for re- -ceiving `a cutting tool "46*which when the l of a set screw 47;

toolcarrier is arrangedonthe tool head projects radially. .The tool 46 may be clamped in `its socketin vthe tool carrierf43 by means Likewise, the tool carrier as `a Vwholeinziy be clamped `in placewith respectto the tool head ,by means of a tool the bushing `12. A' :After thecenter of the bushing `has been` found, andithe mandrelisstationarily `positioned"ain-axial alignment therewith, the feelermechanism' isemployed f for locating the` lowest 'point inthe bushing n 12; performing this opera-tionl'the toolV `l`i`ead16`` is rotated and moved axially oi vthe bushing 12 until th'elowest point is found the feeler 34. Thiswill bevi'sibly indicated on` vthe dial 40.;A When this `low point` yhasibeen found, the teolhead 161is revolved 4'5 to `force the tool holder 43joutwardly "to:

. engagethe tool'46with thebore ofthe bushing; w-Tfhe" tool clamping screw 48 is then f tightened to clamp thetool holder 43 in this `stated the. tool is principally tool carrier 43` f bushing as desired.

toream the bushing. During this operation the tool head is automatically fed axially.

To accomplish this,

its uppermostend with afeed nut 49. This the uppere'nd oi' thejm y mandrel 18 is.` counterbored and is fitted` at position and maintain the toolu46incutting position, The :tool head-16 is thenlfactuated nut is stationarily secured `in the upper endV y of the mandrel 18 and threadedly :receives a 'feed screw 5,0. @This feed screw OjeXtends the mandrel 18 and is fitted at `its lower!` end with a plungenl. .A running ht being provided between the plunger 51 and the counterhoreinthemandrel 18. l

Y `11s through thefeed nut into 4the counterbore in :The counterbore `in the mandrel l18 in real-` ity comprises .an voilreservoirand thefeed nutV 49 .and the plunger-'51 are each provided with circulating ports sothat reciprocable movementof the plungercaused by axial movemaiidrel 18.1 This Vfilm of `oil prevents chattering oi the device when inloperation.`

a shank 52 of reduced diameter. This shank reduced diameter andV which iis exteriorly threaded to receive a clutching nut56.4 :This

shank of the cap isformed with ata-` pered` end which is split so that whenithe ta- ;peredbore inthe clutchnut 56 is` engaged thereWith,it; willbe contractedeto'grip.the o feedscrew.` `This will cause theieed "screw and the tool head to revolve as a unit vand the clutch nut 156 is utilized to clamp thefeed `screw and tool head16 together so that rota-` tion of the tool head 16 `will advance or retract .y the-tool head 16 zthroughithe bushing 12 as the 1 ifeelerrevolves. the eedscrew isformed with a veryine thread, so vthat an extremelylne cut is taken Y It is seen thattheidirection which the tool f- It sholdbestatedhere that 1. ment ofthe head 16 `with respect tothe mani drel 18 will maintaina film lof oil betweenjthe I o contacting surfaces of the head .16 and the u 9o it is `upper end the head `16 is formed with i 1057 relative tothe feed nut 49 inthe upper endof themandrel118.A` L? i Y ...Therefore when :Teaming-"the bushingwl,

head `16 travels. when in operationdepends the tool fwilllnot travel in the same path .upon its returna is set on end and the tool `is mounted thereon7 In operation of the device, the triple `valve entirely upon itsvdirectionuo rotation and thatit can be-run and Aout through the I h llVhen comingto the end "voila-cut, the feed screw mayhegivenraparl h h l Y j n Y ,g tial? turn by means'of the knob 57 thereon,;so h one-haliiofa,revolutionsolas tojbrlngfC-h@ that upon theyretum. Cut

` tool 46 in alignment with the 'low spot inthe `ojxbore ofA the bnshing 1.2. Thetool clamping clamp the tool on the valve. During this operation the tool head 16 is disengaged from the feed screw so that it may be revolved as desired. After being properly centered, the tool head 1G is both rotated and reciprocated through the bushing to locate the lowest point therein. This may be determined by closely watching the indicator mechanism, which will accurately indicate any movement oi' the feeler member.

lt is understood that during this period the cutting tool is held in inoperative position. After locating the lowest point in the bushing, the mandrel is revolved one-half of a revolution to place the cutting tool in alignment with the lowest point in the bushing. The tool clamping screw is then released to permit the cutting tool to engage the bore 'of the bushing. The cutting tool is then clamped in position.

lt is understood that this cutting tool will cut regardless of the direction ot rotation of the tool head 16, so that after locating the lowest point in the bushing, the tool head may be operated by the handle and feed screw to run the cutting tool in both directions through the bushing to accurately ream the came, After the end oi one cut, the feed screw may be manipulated by hand so that the tool may not travel in the same path when taking the second cut.

hilel have shown the prefered form of my invention, it is to be understood that various changes may be made in its construction by those skilled in the art, without departing from the spirit of the invention, as defined. in the appended claims. 1 Y

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A triple valve roaming tool comprising a mandrel adapted to extend axially through a triple valve body and be clamped thereto, a tool head mounted on said mandrel and capable of rotary and axial movement thereon, said head adapt-ed to be' inserted within the cylinder bushing of the valve body for operation therein, indicating means carried by the tool head and adapted to constantly engage the bore of the cylinder bushing when the head is positioned therein, said indicating means including a calibrated scale and a cooperating indicator hand arranged on the tool head at a visible point to indicate the diiierences in diameter of the bore of the bushing at different points therealong or the amount of eccentricity of the head with relation to the bore when the head is revolved and moved axially of the bushing, a cutting tool carried by the head and normally held in an inoperative position during the operation of the indicating means, means Jfor positioning and maintaining said tool in an operative position without removing the head from the bushing after the head has been centered and the low spot located in the bushing.

2. A triple valve reaming tool comprising a mandrel adapted to engage a triple valve, a tool head mounted on the mandrel for rotary and axial movement, a movable feeler member carried by the tool head and adapted to be spring-pressed into engagement with the bore of the cylinder bushing when the head is arranged within the bushing, indicating means arranged. on the portion of the head visible when t-he head is in the bushing, an operative connection between the fceler member and the indicating means whereby the latter will visibly indicate the movement of the teeler and translate the motion of the same into measured distances to indicate the amount ot eccentricity of the head relative to the bore of' the cylinder bushing or differences in diameter of the bore at dierent points therealong, a cutting tool carried by the head and normally held in an inoperative position during the operation of the indicating means, means for positioning and maintaining said tool in an operative position without removing the head from the bushing atter the head has been centered and the low spot located in the bushing.

3. A reaming tool for triple valves comprising a mandrel adapted to extend axially through the triple valve body and be clamped thereto co-axially with the cylinder bushing, a tool head mounted for rotary and axial movement on the mandrel, a feeler member arranged transversely of the head and projecting radially outwardly from the exterior surface thereof whereby it will engage the bore of the cylinder bushing when the head is positioned within the bushing, spring means constantly tending to maintain the feeler member in its outermost position against the bore ot the cylinder bushing whereby the feeler member will follow the contour of the bore, said head being formed with an axially arranged recess project-ing inwardly from its outermost end at an eccentric point relative to its center, an indicating pin disposed within said recess and pivoted at its innermost end to the head, a connection between the feeler member and said pin whereby movement of the former Awill be transmitted to the pin, a' calibrated scale at the outermost end of the head, an indicator hand cooperating therewith, a-connection between the hand and the pin whereby movement of the teeler member will be transmitted through the pin to the hand and the amount of movement of the eeler member indicated in measnred'quantities on the scale by the hand.

4. A reaming tool for triple valves comprising a mandrel adapted to extend axially through the triple valve body and be clamped thereto co-axially with the cylinder bushing, a tool head mounted for rotary and axial movement on the mandrel, a feel member arranged transversely of the head and project- A face thereof whereby it will engage the bore y ing radially outwardly from the exterior surof the cylinder bushing ,when the `head is positioned within the bushing, y constantly tending to maintain the feeler member in its outermost position against the bore of the cylinder bushing whereby the feeler member will follow the contour of the bore, saidhead being formed withan axially arranged recess projecting inwardly from i yits outermost end at aneccentric point relai tive to its center, an indicating pin disposed within said recess andv pivoted at its inneri l `most end to the head, a connection between y Y "15 n l movement of the former will be transmittedV the feeler member and said pin: whereby to the pin, acalibrated scale at the outermost end of the head, an indicator hand cooperatingv therewith, a connection between the hand and the pin whereby movement of the feeler member `will be transmitted through the pin to the hand and the amount of movement of the eeler member indicated in measured quantities on the scale by the hand, a cutting s tool carried by the head and normally held in an inoperative position during the loperation of the indicating means, means :for posin tlomng andrmalntalmng said tool 1n an 0pi erative position without removing the head from the bushing after the head has been JAMES R. RrcKnfr'rs.

`Centered and the low Vspot located in the bushing.` i

spring l means i 

